install.rst: added explanation about why libxml2 2.6.28 or above is required
install.rst: added explanation about why libxml2 2.6.28 or above is required

AaronTao1990/scrapy,smaty1/scrapy,YeelerG/scrapy,cyrixhero/scrapy,xiao26/scrapy,rklabs/scrapy,webmakin/scrapy,nett55/scrapy,Adai0808/scrapy-1,jeffreyjinfeng/scrapy,ArturGaspar/scrapy,pablohoffman/scrapy,Allianzcortex/scrapy,pranjalpatil/scrapy,zjuwangg/scrapy,jeffreyjinfeng/scrapy,wenyu1001/scrapy,dacjames/scrapy,CENDARI/scrapy,jc0n/scrapy,fafaman/scrapy,eliasdorneles/scrapy,jeffreyjinfeng/scrapy,lacrazyboy/scrapy,ramiro/scrapy,ENjOyAbLE1991/scrapy,WilliamKinaan/scrapy,rahul-c1/scrapy,olafdietsche/scrapy,eliasdorneles/scrapy,Zephor5/scrapy,kimimj/scrapy,kalessin/scrapy,elacuesta/scrapy,Zephor5/scrapy,beni55/scrapy,hectoruelo/scrapy,dangra/scrapy,csalazar/scrapy,amboxer21/scrapy,avtoritet/scrapy,Digenis/scrapy,w495/scrapy,bmess/scrapy,1yvT0s/scrapy,crasker/scrapy,emschorsch/scrapy,shaform/scrapy,gnemoug/scrapy,Preetwinder/scrapy,Ryezhang/scrapy,songfj/scrapy,stenskjaer/scrapy,olorz/scrapy,jc0n/scrapy,avtoritet/scrapy,rklabs/scrapy,farhan0581/scrapy,scrapy/scrapy,dhenyjarasandy/scrapy,zackslash/scrapy,w495/scrapy,dacjames/scrapy,nett55/scrapy,liyy7/scrapy,tagatac/scrapy,Timeship/scrapy,Chenmxs/scrapy,Djlavoy/scrapy,hectoruelo/scrapy,ssteo/scrapy,crasker/scrapy,heamon7/scrapy,CENDARI/scrapy,moraesnicol/scrapy,yusofm/scrapy,gbirke/scrapy,gnemoug/scrapy,cleydson/scrapy,nowopen/scrapy,rahulsharma1991/scrapy,rolando-contrib/scrapy,starrify/scrapy,rootAvish/scrapy,cursesun/scrapy,kazitanvirahsan/scrapy,Preetwinder/scrapy,pombredanne/scrapy,livepy/scrapy,tntC4stl3/scrapy,huoxudong125/scrapy,Zephor5/scrapy,johnardavies/scrapy,emschorsch/scrapy,huoxudong125/scrapy,hwsyy/scrapy,fafaman/scrapy,sardok/scrapy,ENjOyAbLE1991/scrapy,fontenele/scrapy,raphaelfruneaux/scrapy,lacrazyboy/scrapy,Digenis/scrapy,xiao26/scrapy,arush0311/scrapy,Lucifer-Kim/scrapy,eLRuLL/scrapy,AaronTao1990/scrapy,jamesblunt/scrapy,tntC4stl3/scrapy,hansenDise/scrapy,pawelmhm/scrapy,wujuguang/scrapy,Parlin-Galanodel/scrapy,kmike/scrapy,AaronTao1990/scrapy,KublaikhanGeek/scrapy,Partoo/scrapy,hbwzhsh/scrapy,zjuwangg/scrapy,livepy/scrapy,shaform/scrapy,moraesnicol/scrapy,hansenDise/scrapy,eLRuLL/scrapy,foromer4/scrapy,barraponto/scrapy,URXtech/scrapy,curita/scrapy,livepy/scrapy,chekunkov/scrapy,gbirke/scrapy,Geeglee/scrapy,yarikoptic/scrapy,carlosp420/scrapy,cursesun/scrapy,CodeJuan/scrapy,mouadino/scrapy,bmess/scrapy,pombredanne/scrapy,godfreyy/scrapy,hyrole/scrapy,agreen/scrapy,umrashrf/scrapy,redapple/scrapy,godfreyy/scrapy,Adai0808/scrapy-1,wangjun/scrapy,rootAvish/scrapy,pablohoffman/scrapy,profjrr/scrapy,z-fork/scrapy,yidongliu/scrapy,rklabs/scrapy,irwinlove/scrapy,IvanGavran/scrapy,Bourneer/scrapy,URXtech/scrapy,Allianzcortex/scrapy,tntC4stl3/scrapy,scorphus/scrapy,coderabhishek/scrapy,kashyap32/scrapy,mgedmin/scrapy,fontenele/scrapy,chekunkov/scrapy,IvanGavran/scrapy,1yvT0s/scrapy,snowdream1314/scrapy,yusofm/scrapy,tagatac/scrapy,coderabhishek/scrapy,taito/scrapy,agusc/scrapy,curita/scrapy,github-account-because-they-want-it/scrapy,wenyu1001/scrapy,CodeJuan/scrapy,haiiiiiyun/scrapy,rolando-contrib/scrapy,coderabhishek/scrapy,wangjun/scrapy,Cnfc19932/scrapy,hansenDise/scrapy,heamon7/scrapy,Lucifer-Kim/scrapy,tliber/scrapy,sardok/scrapy,avtoritet/scrapy,ramiro/scrapy,cyrixhero/scrapy,Chenmxs/scrapy,jdemaeyer/scrapy,elijah513/scrapy,johnardavies/scrapy,arush0311/scrapy,Partoo/scrapy,scrapy/scrapy,stenskjaer/scrapy,ndemir/scrapy,jiezhu2007/scrapy,KublaikhanGeek/scrapy,wzyuliyang/scrapy,umrashrf/scrapy,nfunato/scrapy,Cnfc19932/scrapy,URXtech/scrapy,scorphus/scrapy,kmike/scrapy,redapple/scrapy,Parlin-Galanodel/scrapy,mlyundin/scrapy,jdemaeyer/scrapy,github-account-because-they-want-it/scrapy,TarasRudnyk/scrapy,nfunato/scrapy,nowopen/scrapy,famorted/scrapy,zorojean/scrapy,cyberplant/scrapy,Bourneer/scrapy,z-fork/scrapy,pablohoffman/scrapy,liyy7/scrapy,nguyenhongson03/scrapy,Chenmxs/scrapy,codebhendi/scrapy,csalazar/scrapy,fpy171/scrapy,jiezhu2007/scrapy,pawelmhm/scrapy,cleydson/scrapy,liyy7/scrapy,Digenis/scrapy,kalessin/scrapy,Djlavoy/scrapy,rolando/scrapy,famorted/scrapy,webmakin/scrapy,cleydson/scrapy,starrify/scrapy,stenskjaer/scrapy,w495/scrapy,cyrixhero/scrapy,pfctdayelise/scrapy,elijah513/scrapy,yusofm/scrapy,WilliamKinaan/scrapy,tliber/scrapy,sigma-random/scrapy,aivarsk/scrapy,ssh-odoo/scrapy,kazitanvirahsan/scrapy,zorojean/scrapy,Geeglee/scrapy,jorik041/scrapy,dgillis/scrapy,fqul/scrapy,profjrr/scrapy,dhenyjarasandy/scrapy,GregoryVigoTorres/scrapy,Partoo/scrapy,JacobStevenR/scrapy,codebhendi/scrapy,github-account-because-they-want-it/scrapy,rahulsharma1991/scrapy,dracony/scrapy,pranjalpatil/scrapy,wangjun/scrapy,nfunato/scrapy,devGregA/scrapy,johnardavies/scrapy,mouadino/scrapy,Adai0808/scrapy-1,IvanGavran/scrapy,wenyu1001/scrapy,rahul-c1/scrapy,jiezhu2007/scrapy,jc0n/scrapy,JacobStevenR/scrapy,jdemaeyer/scrapy,mlyundin/scrapy,webmakin/scrapy,Lucifer-Kim/scrapy,GregoryVigoTorres/scrapy,foromer4/scrapy,pfctdayelise/scrapy,sigma-random/scrapy,kalessin/scrapy,yidongliu/scrapy,Slater-Victoroff/scrapy,scorphus/scrapy,Parlin-Galanodel/scrapy,cyberplant/scrapy,dgillis/scrapy,legendtkl/scrapy,tliber/scrapy,ndemir/scrapy,pombredanne/scrapy,huoxudong125/scrapy,mlyundin/scrapy,Djlavoy/scrapy,jorik041/scrapy,hectoruelo/scrapy,ENjOyAbLE1991/scrapy,farhan0581/scrapy,emschorsch/scrapy,Timeship/scrapy,bmess/scrapy,ArturGaspar/scrapy,Bourneer/scrapy,crasker/scrapy,JacobStevenR/scrapy,rolando/scrapy,raphaelfruneaux/scrapy,dangra/scrapy,joshlk/scrapy,hwsyy/scrapy,darkrho/scrapy-scrapy,profjrr/scrapy,ashishnerkar1/scrapy,agusc/scrapy,Cnfc19932/scrapy,taito/scrapy,scrapy/scrapy,csalazar/scrapy,redapple/scrapy,CodeJuan/scrapy,yidongliu/scrapy,famorted/scrapy,xiao26/scrapy,jorik041/scrapy,smaty1/scrapy,songfj/scrapy,kashyap32/scrapy,raphaelfruneaux/scrapy,olafdietsche/scrapy,aivarsk/scrapy,codebhendi/scrapy,zorojean/scrapy,foromer4/scrapy,dhenyjarasandy/scrapy,fontenele/scrapy,kazitanvirahsan/scrapy,nguyenhongson03/scrapy,olorz/scrapy,GregoryVigoTorres/scrapy,shaform/scrapy,rdowinton/scrapy,rahulsharma1991/scrapy,joshlk/scrapy,YeelerG/scrapy,devGregA/scrapy,ylcolala/scrapy,ssteo/scrapy,heamon7/scrapy,elijah513/scrapy,nett55/scrapy,cyberplant/scrapy,finfish/scrapy,fqul/scrapy,rahul-c1/scrapy,irwinlove/scrapy,starrify/scrapy,devGregA/scrapy,kashyap32/scrapy,beni55/scrapy,pranjalpatil/scrapy,ssteo/scrapy,darkrho/scrapy-scrapy,ylcolala/scrapy,ArturGaspar/scrapy,CENDARI/scrapy,Ryezhang/scrapy,dracony/scrapy,barraponto/scrapy,rolando/scrapy,ssh-odoo/scrapy,zhangtao11/scrapy,rdowinton/scrapy,dacjames/scrapy,zhangtao11/scrapy,hwsyy/scrapy,fpy171/scrapy,legendtkl/scrapy,irwinlove/scrapy,Preetwinder/scrapy,taito/scrapy,hbwzhsh/scrapy,Allianzcortex/scrapy,wzyuliyang/scrapy,finfish/scrapy,z-fork/scrapy,elacuesta/scrapy,fqul/scrapy,tagatac/scrapy,pfctdayelise/scrapy,beni55/scrapy,smaty1/scrapy,ramiro/scrapy,haiiiiiyun/scrapy,Slater-Victoroff/scrapy,joshlk/scrapy,eLRuLL/scrapy,OpenWhere/scrapy,godfreyy/scrapy,YeelerG/scrapy,dgillis/scrapy,amboxer21/scrapy,finfish/scrapy,wujuguang/scrapy,jamesblunt/scrapy,lacrazyboy/scrapy,yarikoptic/scrapy,Geeglee/scrapy,Timeship/scrapy,Ryezhang/scrapy,farhan0581/scrapy,hyrole/scrapy,fafaman/scrapy,darkrho/scrapy-scrapy,zackslash/scrapy,nikgr95/scrapy,elacuesta/scrapy,agreen/scrapy,haiiiiiyun/scrapy,rdowinton/scrapy,zhangtao11/scrapy,nikgr95/scrapy,fpy171/scrapy,dracony/scrapy,eliasdorneles/scrapy,songfj/scrapy,yarikoptic/scrapy,hyrole/scrapy,nowopen/scrapy,zjuwangg/scrapy,mgedmin/scrapy,kimimj/scrapy,WilliamKinaan/scrapy,ssh-odoo/scrapy,olafdietsche/scrapy,KublaikhanGeek/scrapy,kimimj/scrapy,curita/scrapy,aivarsk/scrapy,legendtkl/scrapy,umrashrf/scrapy,moraesnicol/scrapy,agreen/scrapy,rootAvish/scrapy,rolando-contrib/scrapy,carlosp420/scrapy,carlosp420/scrapy,1yvT0s/scrapy,ylcolala/scrapy,dangra/scrapy,OpenWhere/scrapy,agusc/scrapy,TarasRudnyk/scrapy,arush0311/scrapy,OpenWhere/scrapy,wujuguang/scrapy,nguyenhongson03/scrapy,pawelmhm/scrapy,olorz/scrapy,snowdream1314/scrapy,snowdream1314/scrapy,TarasRudnyk/scrapy,zackslash/scrapy,chekunkov/scrapy,nikgr95/scrapy,ashishnerkar1/scrapy,wzyuliyang/scrapy,kmike/scrapy,mgedmin/scrapy,Slater-Victoroff/scrapy,hbwzhsh/scrapy,cursesun/scrapy,amboxer21/scrapy,barraponto/scrapy